JPH04501087A - How to manufacture a crown for an articulated piston - Google Patents

How to manufacture a crown for an articulated piston

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Publication number
JPH04501087A
JPH04501087A JP89501366A JP50136689A JPH04501087A JP H04501087 A JPH04501087 A JP H04501087A JP 89501366 A JP89501366 A JP 89501366A JP 50136689 A JP50136689 A JP 50136689A JP H04501087 A JPH04501087 A JP H04501087A
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Japan
Prior art keywords
crown
side wall
top surface
ring groove
machining
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JP89501366A
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Japanese (ja)
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JP2801049B2 (en
Inventor
アダムス　マーシャル
レックナー　ジェリー　エム
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キャタピラー　インコーポレーテッド
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/0069—Multi-part pistons the crown and skirt being interconnected by the gudgeon pin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y10T29/49252—Multi-element piston making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y10T29/49265—Ring groove forming or finishing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49989—Followed by cutting or removing material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material
    • Y10T29/49996—Successive distinct removal operations

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Forging (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。 (57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 関節式ピストン用のクラウンを製造する方法技術分野 本発明は、２部品式ピストンのクラウンを製造する方法、一層詳しくは、完成し たクラウンを機械加工する方法に関する。[Detailed description of the invention] How to manufacture crowns for articulated pistonsTechnical field The present invention relates to a method for manufacturing a two-part piston crown, and more particularly to a method for manufacturing a two-part piston crown. This invention relates to a method for machining a crown.

背　景 過去数年にわたるエンジンの開発で、エンジンの排気量を増大させることなく馬 力が向上した。この馬力の向上のためには、ピストンを介して連接棒に伝えられ る燃焼室内燃焼圧力を増大させる必要があった。background Engine development over the past few years has enabled the horse to be powered without increasing engine displacement. Strength has improved. In order to increase this horsepower, the power is transmitted to the connecting rod through the piston. It was necessary to increase the combustion pressure in the combustion chamber.

燃焼圧力の増大には、ピストンの一体性を改善して増大した応力に耐えるように しなければならない。過去にも、また、今日の多くのケースでも、ピストンはア ルミニウムまたは鋳鉄で作られている。ここに述べるピストンというのは、２部 品量節式ピストンの、鍛造で機械加工したクラウンを設けることによって増大し た圧力に耐える要件を満たしているものとする。鍛造材料は５ＡＥ４１４０であ り、クロムとモリブデンを含む合金鋼である。Increased combustion pressure requires improved piston integrity to withstand the increased stress. Must. In the past, and in many cases today, pistons Made of aluminum or cast iron. The piston described here has two parts. Increased by the forged and machined crown of the low-volume piston. shall meet the requirements for withstanding pressure. The forging material is 5AE4140. It is an alloy steel containing chromium and molybdenum.

より高級な鋼のピストン・クラウンを開発しているときに、機械加工がきわめて 難しい材料が発見された。この材料はきわめて強靭であるため、工具のガミング を生じさせる性質があり、独特な機械加工法を開発する必要があった。これが本 発明の主題である。While developing higher grade steel piston crowns, machining was extremely difficult. A difficult material has been discovered. This material is extremely tough and prevents tool gumming. It is necessary to develop a unique machining method. this is the book is the subject of the invention.

発明の開示 本発明の一局面によれば、関節式ピストンのクラウンを製造する方法が提供され る。このクラウンは、円形の頂面と、この頂面から下方に延びる燃焼クレータと 、頂面から下方に延び、円筒形の表面を有する側壁とを有する。側壁には、複数 のリング溝が設けてあり、これらのリング溝は頂面から下方に間隔を置いて位置 している。側壁は頂面および燃焼クレータ付近まで延びる冷却ギヤラリの第１側 部を形成する内面を有する。垂れ下がった中央部を貫通して側方に延びるビン受 は孔が形成してあり、また、クレータ付近の面が冷却ギヤラリの第２壁面を形成 している。側壁はその中央部と冷却ギヤラリの間に延びる底面を有し、この底面 はビン受は孔の上方に位置している。Disclosure of invention According to one aspect of the invention, a method of manufacturing a crown for an articulated piston is provided. Ru. This crown has a circular top surface and a combustion crater extending downward from the top surface. , and a side wall extending downwardly from the top surface and having a cylindrical surface. On the side wall, there are several These ring grooves are located at intervals downward from the top surface. are doing. The side wall is the first side of the cooling gear that extends to the top surface and near the combustion crater. It has an inner surface forming a section. A bottle holder that extends laterally through the hanging central part. A hole is formed in the hole, and the surface near the crater forms the second wall surface of the cooling gear gallery. are doing. The side wall has a bottom surface extending between the central portion thereof and the cooling gear gallery, and the bottom surface The bottle holder is located above the hole.

機械加工段階は次の通りである。側壁の外面、リング溝、頂面および燃焼クレー タを粗加工する。次の段階で、クラウンの底面を仕上げ加工する。次いで、クラ ウンを保持装置から外し、チャック部材をビン受は孔に挿入する。次に、クラウ ンをその底面を止めに当て、冷却ギヤラリの片面がロケータに当たるように位置 決めする。これにより、クラウンは仕上げ作業に合わせて位置したことになり、 この位置を保ったまま、燃焼クレータ、頂面、リング溝および側壁の円筒形外面 を仕上げ加工することができる。The machining steps are as follows. External surface of side wall, ring groove, top surface and combustion clay Roughly process the data. The next step is to finish the bottom of the crown. Next, the club Remove the bottle from the holding device and insert the chuck member into the bottle holder hole. Next, Crow Position the cooling gear so that its bottom is against the stop and one side of the cooling gear is against the locator. Decide. This ensures that the crown is in position for finishing work. While maintaining this position, the cylindrical outer surface of the combustion crater, top surface, ring groove and side wall can be finished.

本発明の第２の局面は、外面の成る部分をチャックで把持し、この外面の粗加工 を行い、■・つのリング溝の位置に重なった領域でこの作業を終了する粗加工方 法である。次いで、クラウンをチャックから外し、機械加工済みの面に再挿入し 、残った材料を外面から除去し、次いで、リング溝を加工し、切断を中断したと ころに連結部を残す。A second aspect of the present invention is to grip a portion of the outer surface with a chuck and perform rough processing on the outer surface. ■・Rough machining method that finishes this work in the area that overlaps the position of the two ring grooves. It is the law. The crown is then removed from the chuck and reinserted onto the machined surface. , the remaining material was removed from the outer surface, then the ring groove was machined and the cutting was interrupted. Leave a connecting part on the roller.

前記の局面および他の局面は添付図面に関連した以下の説明から明らかとなろう 。特に、図面が発明の限定を意図したも９ではなく、はんの例示の目的で描いた ものであることは了解されたい。The above and other aspects will become apparent from the following description in conjunction with the accompanying drawings. . In particular, the drawings are drawn for illustrative purposes and not for purposes of limitation. Please understand that this is a thing.

図面の簡単な説明 第１図は２部品関節式ピストンの横断面図であり、ここでは、クラウンを断面で 示し、スカート、連接棒およびピストン・ビンを破線で示しである。Brief description of the drawing Figure 1 is a cross-sectional view of a two-part articulated piston, where the crown is shown in cross-section. The skirt, connecting rod and piston pin are shown in dashed lines.

第２図は２部品関節式ピストンのクラウンを製造する段階の概略図である。FIG. 2 is a schematic diagram of the steps in manufacturing the crown of a two-part articulated piston.

発明を実施するための最良の形感 第１図において、ここには、２部品関節式ピストン１ｏが示しである。この２部 品関節式ピストンは、断面で示すクラウン１１と、破線で示す付属のスカート１ ２とを包含する。クラウンおよびスカートはピストン・ビン１６によって連接棒 １４に取り付けられる。連接号１４は図示しないエンジンのクランク軸に取り付 けられる。The best form for carrying out inventions In FIG. 1, a two-part articulated piston 1o is shown. This second part The articulated piston has a crown 11 shown in cross section and an attached skirt 1 shown in broken lines. 2. The crown and skirt are connected to the connecting rod by piston pin 16. 14. Connection number 14 is attached to the crankshaft of the engine (not shown). I get kicked.

クラウン１１は円形の頂面１８と、この頂面１８から下方に延びる燃焼クレータ ２０とを育する。頂面１８からは円形の側壁２２が下方に延びており、この側壁 は円筒形の外面２４を存する。The crown 11 has a circular top surface 18 and a combustion crater extending downward from the top surface 18. Cultivate 20. A circular side wall 22 extends downward from the top surface 18; has a cylindrical outer surface 24.

円筒形の外面２４から側壁２２内へ複数のリング溝２６が延びており、これらの リング溝は頂面１８の下方において間隔を置いて位置している。A plurality of ring grooves 26 extend from the cylindrical outer surface 24 into the side wall 22; The ring grooves are spaced below the top surface 18.

側壁２２は内面２８を存し、この内面は内部冷却ギヤラリ３０の第１側面を構成 する。下方のリング溝２７の底から冷却ギヤラリ３０に向かってドレン通路２７ が延びている。内面２８は頂面１８と燃焼クレータ３０の付近まで上方に延びて いる。垂れ下がり中央部３２が燃焼クレータ２０および頂面１８の下方の隣接し た位置から下方に延びていて一対のボス３４を構成している。各ボスを貫いてピ ン受は孔３６が形成してあり、このピン受は孔はピストン・ビン３６を受ける連 続したビン孔と整合している。ブッシング３７がピン受は孔にプレス族めしであ る。冷却ギヤラリ３０の第２側面３８は、中央部３２の、頂面１８の下方、燃焼 クレータ２０付近で始まる面で与えられる。The side wall 22 has an inner surface 28 that constitutes a first side of the internal cooling gearing 30. do. The drain passage 27 extends from the bottom of the lower ring groove 27 toward the cooling gear gallery 30. is extending. The inner surface 28 extends upwardly to the vicinity of the top surface 18 and the combustion crater 30. There is. The depending central portion 32 is adjacent to the combustion crater 20 and below the top surface 18. A pair of bosses 34 extend downward from the position shown in FIG. Piercing through each boss The pin receiver has a hole 36 formed therein, and the hole is connected to receive the piston pin 36. It is consistent with the continuous bottle hole. The bushing 37 has a pin holder that is pressed into the hole. Ru. The second side 38 of the cooling gearing 30 is located in the central portion 32, below the top surface 18, It is given by a plane starting near crater 20.

側壁２２は円筒形面２４と冷却ギヤラリ３０の間に延びる底面４０を有する。こ の底面４０は、ピン受は孔３６の上方、一層詳しく言えば、ピン受は孔の上方円 形面に対して接線方向の水平面上方に位置する。Sidewall 22 has a bottom surface 40 extending between cylindrical surface 24 and cooling gearbox 30 . child The bottom surface 40 of the pin receiver is located above the hole 36, more specifically, the pin receiver is located above the hole Located above the horizontal plane tangential to the shape.

次に第２図を参照して、上述したクラウンを製造する第１段階は、クロム・モリ ブデン合金からなる鋼合金材料のビレットの鍛造である。この材料は５ＡＥ４０ ４１に記載されている組成物であり、炭素、マンガン、燐、硫黄、シリコン、ク ロム、モリブデン、残余鉄および痕跡元素からなる。Next, referring to FIG. 2, the first step in manufacturing the above-mentioned crown is to It is a forged billet of steel alloy material made of buden alloy. This material is 5AE40 41, and contains carbon, manganese, phosphorus, sulfur, silicon, and carbon. Consists of rom, molybdenum, residual iron and trace elements.

ビレットは、次に、プレス内に置き、ダイによってほぼピストン・クラウンの形 状に鍛造する。このとき、後述の２段階機械加工過程を可能とするに充分な材料 が与えられる。The billet is then placed into a press and shaped approximately into a piston crown by a die. Forged into shape. At this time, sufficient material is available to enable the two-step machining process described below. is given.

本発明の一局面において、第１段階で、クラウンを旋盤内にあるいはボスを機械 加工センタにチャック止めすることによって位置決めし、側壁の外面を機械加工 できるように露出させておく。In one aspect of the invention, the first step is to place the crown in a lathe or machine the boss. Position by chucking to the machining center and machining the outer surface of the side wall. Leave it as exposed as possible.

この段階で、クラウンを粗加工して頂面１８、クレータ２０、側壁の円筒形外面 およびリング溝を製作する。下方リング溝に入れるオイル・リングのためのドレ ン通路をこの段階でドリル加工しても良い。At this stage, the crown is rough-machined to form the top surface 18, the crater 20, and the cylindrical outer surface of the side wall. and make a ring groove. Drain for oil ring to lower ring groove You may drill the passageway at this stage.

この第１段階の別の方法としては、側壁の鍛造した外面をチャック止めし、その 一部を粗加工し、リング溝の１つと重なる領域において切削を中断するという方 法もある。次いで、クラウンをチャックから外し、粗加工面を再チャック止めす る。上述した残りの表面を粗加工してから、１つのリング溝に重なる領域で円筒 形側壁への切削を中断し、次いで、粗削りを行ってリング溝を切削し、切削中断 時に生じた表面の結合部を取り除く。An alternative method for this first step is to chuck the forged outer surface of the sidewall and For those who roughly machine a part and interrupt cutting in the area that overlaps with one of the ring grooves. There is also a law. Next, remove the crown from the chuck and chuck the rough machined surface again. Ru. Roughly machine the remaining surfaces as described above, then cut the cylinder in the area that overlaps one ring groove. Cutting to the side wall of the shape is interrupted, then rough cutting is performed to cut the ring groove, and cutting is interrupted. Remove any surface bonds that may have formed during the process.

粗加工作業中、はぼ０．０３０インチ（０，７５ｍｍ）の材料を仕上げ加工作業 のために残す。During rough machining, finish machining of 0.030 inch (0.75 mm) material leave for.

次の段階で、クラウンを円筒形外面上にチャック止めし・機械加工用にピストン の下面を露出させる。この段階で、底面４０および冷却ギヤラリ３０の壁面を、 ボス３４にピン受は孔３６を明けたと同様に加工する。In the next step, the crown is chucked onto the cylindrical outer surface and the piston is prepared for machining. expose the bottom side of the At this stage, the bottom surface 40 and the wall surface of the cooling gear gallery 30 are The pin receiver is machined in the same way as the hole 36 is drilled in the boss 34.

次の段階で、ブッシング３７をピン受は孔３６内にプレス族めし、エンジンに組 み込むときにピストン・ビンに適合する寸法まで仕上げ加工する。In the next step, the bushing 37 is pressed into the pin hole 36 and assembled into the engine. Finish machining to the dimensions that fit the piston bottle when inserting.

次の段階で、バーまたはチャック部材をピン受は孔に挿入し、これを機械チャッ ク内でドローパーによって把持する。ピストン・クラウンの底面４０はチャック のフェースプレートまたはロケータに向かって引く。これにより、クラウンが最 終加工作業のためにチャック上の芯合わせ位置に位置する。In the next step, the bar or chuck member is inserted into the hole of the pin receiver and this is inserted into the mechanical chuck. grip with a drawper inside the box. The bottom surface 40 of the piston crown is a chuck faceplate or locator. This will ensure that the crown is Located in centering position on the chuck for finishing operations.

仕上げ加工作業の後、クラウンをチャックから外し、最終的な組み立ての準備を することができる。　クレータ、頂面、円筒形外面およびリング溝についてのこ の２段階機械加工により、工具跡や他の欠陥のない仕上げ面を得ることができる 。このような欠陥はクラウンの一体性を壊すことになるなんらかの亀裂を伝播す る可能性がある。After finishing operations, the crown is removed from the chuck and prepared for final assembly. can do. About the crater, top surface, cylindrical outer surface and ring groove The two-step machining process provides a finished surface free of tool marks and other defects. . Such defects may propagate some kind of crack that will destroy the integrity of the crown. There is a possibility that

上記の方法は冷却ギヤラリを仕上げる処理段階や鍛造過程のための段階を含まな い。The above method does not include a processing step for finishing the cooling gear or a step for the forging process. stomach.

本発明の他の局面、目的および利点は本明細書、図面および添付請求の範囲を研 究することから明らかとなろう。Other aspects, objects, and advantages of the invention may be found in the specification, drawings, and appended claims. This will become clear through investigation.

第２図 国際調査報告 ｌ詐−−Ｇｓ＋Ｉ＠ｍ−ム―−に一１’−Ｎ−、ＰＣＴ／ｕｓ８８１０４６０５ １ＩＩＩ＠ｆｉｔ−ＩＩａｌ＾ｅｅ＋＝−１，−−−ＰＣＴ／ＵＳ　８８１０４ ６０５−階一一＾−−減一神＊　ｐｃＴｌｕｓ　８８１０４６０５国際調査報告Figure 2 international search report 1'-N-, PCT/us88104605 1III@fit-IIal＾ee+=-1, ---PCT/US 88104 605-Kai 11^--Reduced One God *pcTlus 88104605 International Investigation Report

Claims (1)

【特許請求の範囲】 １．関節式ピストン（１０）のクラウン（１１）であって、円形の頂面（１８） 、この頂面から下方に延びる燃焼クレータ（２０）、頂面（１８）から垂れ下が り、円筒形の外面（２４）を有する側壁（２２）および側壁（２２）に設けてあ り、頂面（１８）の下方の間隔を置いた位置に配置した複数のリング溝（２６） を有するクラウン（１１）であり、側壁（２２）が、冷却ギャラリ（３０）の、 頂面（１８）および燃焼クレータ（２０）付近まで延びる第１側面を形成す内面 （２８）と、側方に貫通するピン受け孔（３６）を有する垂れ下がり中央部（３ ２）とを有し、この中央部（３２）が冷却ギャラリ（３０）の第２側面（３８） を形成する表面を有し、側壁（２２）がそれと冷却ギャラリ（３０）の間に延在 し、ピン受け孔（３６）上方に位置する底面（４０）を有するクラウン（１１） を製造する方法であって、 ａ．側壁（２２）の円筒形外面（２４）、リング溝（２６）、頂面（１８）およ び燃焼クレータ（２０）を粗加工する段階と、ｂ．クラウン（１１）の底面（４ ０）を仕上げ加工する段階と、 ｃ．ピン受け孔（３６）を通して或る部材を挿入し、クラウン（１１）の底面（ ４０）を止めに当てがい、冷却ギャラリ（３０）の片側（２８、３８）をろけえ たに当てがってクラウン（１１）を位置決めする段階と、 ｄ．クラウン（１１）を位置決めしながら燃焼クレータ（２０）、頂面（１８） 、リング溝（２６）、側壁（２２）の円筒形外面（２４）を仕上げ加工する段階 とを包含することを特徴とする方法。 ２．請求の範囲第１項記載の方法において、鋼合金のビレットからクラウン（１ １）をほぼ完成クラウンの形状に鍛造し、粗加工段階、仕上げ加工段階のために 充分な材料を残す段階を包含することを特徴とする方法。 ３．請求の範囲第２項記載の方法において、鋼合金が、炭素、マンガン、燐、硫 黄、シリコン、クロム、モリブデン、残余鉄および痕跡元素からなることを特徴 とする方法。 ４．請求の範囲第１項記載の方法において、粗加工段階後に約０．０３０インチ （０．７５ｍｍ）の材料が残り、仕上げ加工段階で除去されることを特徴とする 方法。 ５．請求の範囲第１項記載の方法において、粗加工段階がボス（３４）をチャッ クで締め付けることによってクラウン（１１）を保持する段階を含むことを特徴 とする方法。 ６．請求の範囲第１項記載の方法において、粗加工段階が、ａ．側壁（２２）を その一端付近で把持し、その円筒形外面（２４）の、側壁（２２）の別の端と１ つのリング溝（２６）の位置と重なる領域との間の部分を機械加工する段階と、 ｂ．円筒形外面（２４）の前記粗加工した部分を把持し、側壁（２２）の円筒形 外面（２４）の、前記一端と１つのリング溝（２６）の前記重なる領域の間の残 りの部分を粗加工する段階と、 ｃ．側壁（２２）に前記１つのリング溝（２６）を切削し、段階ａ、ｂの粗加工 作業の任意の連結部を除去する段階と、ｄ．前記リング溝（２６）の残りを切削 する段階とを包含することを特徴とする方法。 ７．請求の範囲第１項記載の方法において、さらに、ボス（３４）にピン受け孔 （３６）を粗加工する段階と、 ｂ．ピン受け孔（３６）を仕上げ加工する段階と、ｃ．仕上げたピン受け孔（３ ６）にブッシング（３７）を組み込む段階と、 ｄ．請求の範囲第１項の段階ｃの前に組み込んだブッシング（３７）の内径をを その仕上げ直径まで機械加工する段階とを包含することを特徴とする方法。 ８．関節式ピストン（１０）のクラウン（１１）を機械加工する方法であって、 円形の頂面（１８）、この頂面（１８）から下方に延びる燃焼クレータ（２０） 、頂面（１８）から垂れ下がり、円周形の外面（２４）を有する比較的短い側壁 （２２）および側壁（２２）に設けてあり、頂面（１８）の下方で間隔を置いた 位置に配置した複数のリング溝（２６）を有するクラウン（１１）であって、側 壁（２２）が頂面（１８）および燃焼クレータ（２０）に隣接して延びる冷却ギ ャラリ（３０）の第１側面を形成する内面（２８）と、側方に貫通するピン受け 孔（３６）を有する垂れ下がった中央部（３２）とを有し、側壁（２２）が円筒 形側壁（２２）と冷却ギャラリ（３０）の間に延在し、ピン受け孔（３６）の上 方に位置する底面（４０）を有するクラウン（１１）を機械加工する方法におい て、 ａ．側壁（２２）をその一端付近で把持し、その円筒形外面（２４）の、側壁（ ２２）の別の端と１つのリング溝（２６）の位置と重なる領域との間の部分を粗 加工する段階と、ｂ．外面（２４）の前記粗加工した部分を把持し、側壁（２２ ）の円筒形外面（２４）の、前記一端と前記１つのリング溝（２６）の前記重な り領域の間の別の部分を粗仕上げする段階と、 ｃ．側壁（２２）に前記１つのリング溝（２６）を切削し、段階ａ、ｂの粗仕上 げ作業で残った任意の連結部を除去する段階と、 ｄ．前記リング溝（２６）の残りを切削する段階と包含することを特徴とする方 法。 ９．請求の範囲第８項記載の関節式ピストンのクラウンを機械加工する方法にお いて、さらに、 ａ．頂面（１８）、燃焼クレータ（２０）および底面（４０）を粗加工する段階 と、 ｂ．クラウン（１１）の底面（４０）を仕上げ加工する段階と、 ｃ．垂れ下がり中央部（３２）を貫いて側方に延びるピン受け孔（３６）を機械 加工する段階と、ｄ．ピン受け孔（３６）に或る部材を挿入し、底面（４０）を 止めに当てがい、冷却ギャラリ（３０）の片面をロケータに当てがってクラウン （１１）を位置決めする段階と、ｅ．クラウン（１１）を位置決めしながら燃焼 クレータ（２０）、頂面（１８）、円筒形外面（２４）およびリング溝（２６） を仕上げ加工する段階と を包含することを特徴とする方法。[Claims] 1. Crown (11) of the articulated piston (10), the circular top surface (18) , a combustion crater (20) extending downward from the top surface, and a combustion crater (20) that hangs down from the top surface (18). and a side wall (22) having a cylindrical outer surface (24) and provided on the side wall (22). a plurality of ring grooves (26) arranged at spaced positions below the top surface (18); a crown (11) having a side wall (22) of a cooling gallery (30); an inner surface forming a first side surface extending to the vicinity of the top surface (18) and the combustion crater (20); (28) and a hanging central portion (3) having a pin receiving hole (36) passing through the side. 2), the central portion (32) being the second side surface (38) of the cooling gallery (30). and a side wall (22) extending between it and the cooling gallery (30). and a crown (11) having a bottom surface (40) located above the pin receiving hole (36). A method of manufacturing, a. The cylindrical outer surface (24) of the side wall (22), the ring groove (26), the top surface (18) and rough machining the combustion crater (20); b. Bottom surface (4) of crown (11) 0), and c. A certain member is inserted through the pin receiving hole (36) and the bottom surface ( 40) to stop it, and loosen one side (28, 38) of the cooling gallery (30). positioning the crown (11) by applying it to the crown; d. Combustion crater (20) and top surface (18) while positioning the crown (11) , ring groove (26), and finishing of the cylindrical outer surface (24) of the side wall (22). A method comprising: 2. The method according to claim 1, wherein the crown (1 1) is forged into the shape of an almost completed crown, and used for the rough processing stage and finishing stage. A method characterized in that it includes the step of leaving sufficient material. 3. The method according to claim 2, wherein the steel alloy contains carbon, manganese, phosphorus, and sulfur. Yellow, characterized by consisting of silicon, chromium, molybdenum, residual iron and trace elements How to do it. 4. The method of claim 1, wherein after the rough machining step about 0.030 inches. (0.75 mm) of material remains and is removed in the finishing stage. Method. 5. A method according to claim 1, in which the rough machining step includes chucking the boss (34). retaining the crown (11) by tightening with a How to do it. 6. A method according to claim 1, wherein the rough machining step comprises: a. side wall (22) gripping the cylindrical outer surface (24) near one end thereof and the other end of the side wall (22); machining a portion between the location of the two ring grooves (26) and the overlapping area; b. Grasp the rough machined portion of the cylindrical outer surface (24) and remove the cylindrical shape of the side wall (22). the remainder of the outer surface (24) between said one end and said overlapping region of one ring groove (26); a step of rough machining the c. Cutting said one ring groove (26) in the side wall (22) and rough machining of steps a and b removing any connections in the work; d. Cut the rest of the ring groove (26) A method comprising the steps of: 7. In the method according to claim 1, the boss (34) is further provided with a pin receiving hole. (36); b. finishing the pin receiving hole (36); c. Finished pin receiving hole (3 6) incorporating the bushing (37) into the d. The inner diameter of the bushing (37) installed before step c of claim 1 is and machining to its finished diameter. 8. A method of machining a crown (11) of an articulated piston (10), comprising: a circular top surface (18); a combustion crater (20) extending downward from the top surface (18); , a relatively short side wall depending from the top surface (18) and having a circumferential outer surface (24) (22) and side walls (22) and spaced below the top surface (18). A crown (11) having a plurality of ring grooves (26) arranged at positions, the crown (11) having a plurality of ring grooves (26) located at a cooling gear whose wall (22) extends adjacent the top surface (18) and the combustion crater (20); an inner surface (28) forming the first side surface of the housing (30) and a pin receiver penetrating laterally; a depending central portion (32) having a hole (36), and the side walls (22) are cylindrical. extending between the shaped side wall (22) and the cooling gallery (30) and above the pin receiving hole (36). In the method of machining a crown (11) having a bottom surface (40) located on the hand, a. Grasping the side wall (22) near one end thereof, the side wall (22) of its cylindrical outer surface (24) 22) and the area that overlaps with the position of one ring groove (26). processing; b. Grasp the rough-machined portion of the outer surface (24) and press the side wall (22) ) of the cylindrical outer surface (24) of said one end and said one ring groove (26). rough finishing another part between the areas; c. Cutting said one ring groove (26) in the side wall (22) and rough finishing of steps a and b removing any connections left by the removal operation; d. and cutting the remainder of the ring groove (26). Law. 9. A method for machining a crown of an articulated piston according to claim 8. And furthermore, a. Rough machining of the top surface (18), combustion crater (20) and bottom surface (40) and, b. finishing the bottom surface (40) of the crown (11); c. Machine a pin receiving hole (36) that extends laterally through the hanging central portion (32). processing; d. Insert a certain member into the pin receiving hole (36) and press the bottom surface (40). Place one side of the cooling gallery (30) on the locator and tighten the crown. (11) positioning the e. Burn while positioning the crown (11) Crater (20), top surface (18), cylindrical outer surface (24) and ring groove (26) and the stage of finishing the A method characterized by comprising:
JP1501366A 1988-10-21 1988-12-23 Method of manufacturing a crown for an articulated piston Expired - Lifetime JP2801049B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US261,457 1988-10-21
US07261457 US4847964B1 (en) 1988-10-21 1988-10-21 Method of producing a crown for an articulated piston
PCT/US1988/004605 WO1990004491A1 (en) 1988-10-21 1988-12-23 A method of producing a crown for an articulated piston

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JPH04501087A true JPH04501087A (en) 1992-02-27
JP2801049B2 JP2801049B2 (en) 1998-09-21

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EP (1) EP0439459B1 (en)
JP (1) JP2801049B2 (en)
BR (1) BR8807924A (en)
DE (1) DE3875253T2 (en)
WO (1) WO1990004491A1 (en)

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DE3875253T2 (en) 1993-05-06
DE3875253D1 (en) 1992-11-12
US4847964B1 (en) 2000-05-09
JP2801049B2 (en) 1998-09-21
BR8807924A (en) 1991-08-13
WO1990004491A1 (en) 1990-05-03
US4847964A (en) 1989-07-18
EP0439459B1 (en) 1992-10-07
EP0439459A1 (en) 1991-08-07

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